锻压技术

基于金属流线分析的三柱槽壳温挤件工艺优化

英文标题：Process optimization on warm extrusion housing part based on metal flow line

作者：李超陈立宇姜同竹张太良王匀

分类号：TG376.1

出版年,卷(期):页码：2017,42(1):143-148

摘要：

挤压件体积成形过程中，金属流线对其使用性能影响很大。针对三柱槽壳温挤件金属流线不佳现象，分析了流线的形成过程，研究了正挤工艺、反挤凸模形状和尺寸、摩擦力和挤压速度对金属流线的影响规律。据此提出改善流线结构的方案，并进行实验验证。结果表明：相对于平底和梯形反挤冲头，三角冲头结构对金属流线的引导作用更佳，且在保证沟道尺寸的前提下，三角冲头底面倾斜角、引流圆锥凸台顶角圆弧半径和底面直径越大越好；正挤凹模锥角取60°~90°最为合理；摩擦力对金属流线影响较大，摩擦力越大，金属流线越差；挤压速度对金属流线的影响不大。

Metal flow line has a great influence on performance of extrusion part during volume forming process. To solve the poor metal flow line of warm extrusion housing part, the whole forming process of metal flow line was analyzed, and the influences of forward extrusion technique, punch shape and size of backward extrusion, friction force and extrusion speed on metal flow line were studied. Furthermore, an improvement scheme was proposed and verified by the experiment. The experiment results show that the triangular punch is the best guidance for metal flow line compared to the trapezoidal punch and flat punch. On the premise of an appropriate channel size, the values of bottom inclined angle of triangular punch, the top arc radius and bottom diameter of guidance cone are better to be larger. Besides, the appropriate conical angle of forward extrusion female die is 60°-90°. And the friction has a greater influence on metal flow line, the bigger the friction is, the worse the metal flow line is. However, the extrusion speed has little effect on metal flow line.

基金项目：

江苏省科技成果转化专项资金(SBA2014030056)； “青蓝工程”学术带头人（苏教师(2014)23号）；江苏省重点研发计划(BE2015134)；镇江市重点研发计划(GY2015008)

李超（1992-），男，硕士研究生 E-mail：394708557@qq.com 通讯作者：王匀（1975-），男，博士，教授 E-mail：wangyun@ujs.edu.cn

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